CN101619720B - Method for processing graphite stator of vane pump - Google Patents
Method for processing graphite stator of vane pump Download PDFInfo
- Publication number
- CN101619720B CN101619720B CN2009101011110A CN200910101111A CN101619720B CN 101619720 B CN101619720 B CN 101619720B CN 2009101011110 A CN2009101011110 A CN 2009101011110A CN 200910101111 A CN200910101111 A CN 200910101111A CN 101619720 B CN101619720 B CN 101619720B
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- China
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- stator
- graphite
- graphite stator
- inner chamber
- vane pump
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Abstract
The invention relates to a method for processing a graphite stator of a vane pump, which overcomes the defects of unstable size caused by a traditional turning and grinding method by a graphite rod through ways of extrusion molding, molding treatment, thermal treatment and post processing. A graphite stator obtained by the processing of the method has high batch size stability and effectively ensures the size precision.
Description
Technical field
The present invention relates to a kind of processing method of graphite stator of vane pump.
Background technique
Existing its rotor of common vane pump, stator, blade etc. all are to adopt steel material, in use, owing to can be in frequent high-speed friction, knockout process between blade, stator, the rotor, the steel powder that therefore unavoidably some experience wear can occur and produce, these powder just go out to fall in the middle of the medium, thereby can pollute medium, these can cause great influence to people's health especially especially at manufacture fields such as food, medicines.Being directed to this, a kind of vane pump occurs, is forward and backward bearing and stator employing graphite material with blade and rotor both sides, to improve its environmental protection, sanitation performance.But in the existing processes, graphite stator processes in the following way: solid graphite bar is obtained the endoporus of stator through turning, and then obtain the inner chamber that is made of several sections not isometrical circular arcs by grinding fine finishing.And in this processing method,, can make very quick-wearing of machine cutting tool, thereby can not guarantee the dimensional accuracy of inner chamber because its hardness of graphite is very high.
Summary of the invention
The objective of the invention is to solve the deficiency of the processing technology of existing graphite stator, and the novel processing method of the graphite stator of the reliable and stable vane pump of a kind of dimensional accuracy is provided.
The objective of the invention is to realize by following technical solution: a kind of processing method of graphite stator of vane pump is characterized in that: include following steps:
A. squeeze and penetrate moulding: plumbago is preheated to 90-110 ℃, inject the mold die cast then and obtain blank, the temperature of mold is approximately 180 ℃, briquetting pressure is more than 40Mpa, and the cavity dimension of this mold calculates and gets with certain shrinkage and pattern draft again according to the size shape of graphite stator;
B. typing is handled: this blank is taken out the back be inserted in core in the hole within it from mold, the shape of the inner chamber of the shape of the periphery of this core and size and graphite stator, measure-alike was placed about 10 hours then at normal temperatures, took out core more at once;
C. heat treatment: the product after will finalizing the design is put into baking box, and oven temperature slowly is increased to 140-160 ℃, is incubated 3-4 hour, be cooled to normal temperature with case after, slowly heat again to 190-210 ℃, be incubated 3-4 hour, take out after being cooled to normal temperature with case;
D. back processing: the cylindrical to after heat treatment product carries out grinding, makes its size consistent with the excircle dimension of graphite stator to grind off its tapering.
Further, back processing is further comprising the steps of: the inner chamber of finished product is carried out polishing treatment make its inner chamber have good degree of finish.
Further again, adopt knitting wool that the inner chamber of finished product is carried out polishing treatment.
Fine by its dimensional stability in batches of graphite stator that processing method of the present invention obtains, dimensional accuracy can effectively be guaranteed.
Embodiment
A kind of graphite stator of vane pump, make as follows:
Squeeze and penetrate moulding: plumbago is preheated to 90-110 ℃, inject the mold die cast then and obtain blank, the temperature of mold is approximately 180 ℃, briquetting pressure is more than 40Mpa, and the cavity dimension of this mold calculates and gets with certain shrinkage and pattern draft again according to the size shape of graphite stator; It compares the blank that die casting forms through mold with the size of graphite stator, and its external diameter and inner chamber all have certain tapering (pattern draft just), owing to have contraction, therefore also needs next step typing to handle in addition.
Typing is handled: this blank is taken out the back be inserted in core in the hole within it from mold, the shape of the inner chamber of the shape of the periphery of this core and size and graphite stator, measure-alike was placed about 10 hours then at normal temperatures, took out core more at once; Handle the size of rear interior cavity and measure-alike (the no longer including tapering) of stator through typing, but size is also unstable, its mechanical property is also unstable, therefore also needs next step heat treatment.
Heat treatment: the product after will finalizing the design is put into baking box, and oven temperature slowly is increased to about 140-160 ℃, is incubated 3-4 hour, be cooled to normal temperature with case after, slowly heat again to 190-210 ℃, be incubated 3-4 hour, take out after being cooled to normal temperature with case.Heat treatment has the effect of the resistance to heat, dimensional stability and the mechanical property that improve product.
Back processing: the cylindrical to after heat treatment product carries out grinding, make its size consistent to grind off its tapering, simultaneously the inner chamber of finished product is carried out polishing treatment with knitting wool (dacron line) to the inner chamber of finished product and make its inner chamber have good degree of finish with the excircle dimension of graphite stator.It should be noted that polishing treatment not necessarily, this is according to actual conditions, if the degree of finish of its inner chamber of finished product has after heat treatment reached requirement, then need not polishing.In addition, it is higher to adopt knitting wool to polish its degree of finish.
Fine by its dimensional stability in batches of graphite stator that above method obtains, dimensional accuracy can effectively be guaranteed, and be had the favorable mechanical performance.
Claims (3)
1. the processing method of the graphite stator of a vane pump is characterized in that: include following steps:
A. squeeze and penetrate moulding: plumbago is preheated to 90-110 ℃, inject the mold die cast then and obtain blank, the temperature of mold is approximately 180 ℃, briquetting pressure is more than 40Mpa, and the cavity dimension of this mold calculates and gets with certain shrinkage and pattern draft again according to the size shape of graphite stator;
B. typing is handled: this blank is taken out the back be inserted in core in the hole within it from mold, the shape of the inner chamber of the shape of the periphery of this core and size and graphite stator, measure-alike was placed about 10 hours then at normal temperatures, took out core more at once;
C. heat treatment: the product after will finalizing the design is put into baking box, and oven temperature slowly is increased to 140-160 ℃, is incubated 3-4 hour, be cooled to normal temperature with case after, slowly heat again to 190-210 ℃, be incubated 3-4 hour, take out after being cooled to normal temperature with case;
D. back processing: the cylindrical to after heat treatment product carries out grinding, makes its size consistent with the excircle dimension of graphite stator to grind off its tapering.
2. the processing method of the graphite stator of vane pump according to claim 1 is characterized in that: back processing is further comprising the steps of: the inner chamber of finished product is carried out polishing treatment make its inner chamber have good degree of finish.
3. the processing method of the graphite stator of vane pump according to claim 2 is characterized in that: adopt knitting wool that the inner chamber of finished product is carried out polishing treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101011110A CN101619720B (en) | 2009-07-23 | 2009-07-23 | Method for processing graphite stator of vane pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101011110A CN101619720B (en) | 2009-07-23 | 2009-07-23 | Method for processing graphite stator of vane pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101619720A CN101619720A (en) | 2010-01-06 |
| CN101619720B true CN101619720B (en) | 2011-06-15 |
Family
ID=41513094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101011110A Expired - Fee Related CN101619720B (en) | 2009-07-23 | 2009-07-23 | Method for processing graphite stator of vane pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101619720B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020200793A (en) * | 2019-06-10 | 2020-12-17 | 株式会社デンソー | Leakage diagnostic device |
| CN110240482B (en) * | 2019-06-13 | 2021-09-17 | 浙江永灵液压机械有限公司 | Heat treatment process for inner surface of vane pump stator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2191933Y (en) * | 1994-05-10 | 1995-03-15 | 徐懋瑞 | Rotary blade direct connecting dry type oilless vacuum pump |
| JP2000250312A (en) * | 1999-02-26 | 2000-09-14 | Ricoh Co Ltd | Toner transfer pump and image forming device provided with the same |
| US6247906B1 (en) * | 1999-05-28 | 2001-06-19 | Joseph M. Pijanowski | Combined pump and motor device |
| JP2003172290A (en) * | 2001-12-07 | 2003-06-20 | Boc Edwards Technologies Ltd | Vacuum pump |
-
2009
- 2009-07-23 CN CN2009101011110A patent/CN101619720B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2191933Y (en) * | 1994-05-10 | 1995-03-15 | 徐懋瑞 | Rotary blade direct connecting dry type oilless vacuum pump |
| JP2000250312A (en) * | 1999-02-26 | 2000-09-14 | Ricoh Co Ltd | Toner transfer pump and image forming device provided with the same |
| US6247906B1 (en) * | 1999-05-28 | 2001-06-19 | Joseph M. Pijanowski | Combined pump and motor device |
| JP2003172290A (en) * | 2001-12-07 | 2003-06-20 | Boc Edwards Technologies Ltd | Vacuum pump |
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| Publication number | Publication date |
|---|---|
| CN101619720A (en) | 2010-01-06 |
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